Submission #1062913

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062913		Unforgettablepl	Cultivation (JOI17_cultivation)	C++17	5 / 100	40 ms	856 KiB

cultivation

#include <bits/stdc++.h>
using namespace std;

// #define int long long


int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int r,c,n;
    cin >> r >> c >> n;
    vector<pair<int,int>> points(n);
    for(auto&[a,b]:points)cin>>a>>b;
    int minX = 1e9;
    int minY = 1e9;
    for(auto&[a,b]:points) {
        minX=min(a,minX);
        minY=min(b,minY);
    }
    minX=minY=50;
    int tar = r*c;
    auto check = [&](int chosenR,int chosenC){
        vector grid(101,vector(101,0));
        for(auto&[x,y]:points) {
            grid[x][y]++;
            grid[x+chosenR][y]--;
            grid[x][y+chosenC]--;
            grid[x+chosenR][y+chosenC]++;
        }
        for(int i=1;i<=100;i++) {
            for(int j=1;j<=100;j++) {
                grid[i][j]+=grid[i][j-1];
            }
        }
        for(int i=1;i<=100;i++) {
            for(int j=1;j<=100;j++) {
                grid[j][i]+=grid[j-1][i];
            }
        }
        for(int i=1;i<=100;i++) {
            for(int j=1;j<=100;j++) {
                grid[i][j]=min(1,grid[i][j])+grid[i-1][j]+grid[i][j-1]-grid[i-1][j-1];
            }
        }
        auto get = [&](int x1,int y1,int x2,int y2) {
            return grid[x2][y2]-grid[x1-1][y2]-grid[x2][y1-1]+grid[x1-1][y1-1];
        };
        for(int i=1;i<minX;i++) {
            for(int j=1;j<minY;j++) {
                if(get(i,j,i+r-1,j+c-1)==tar)return true;
            }
        }
        return false;
    };
    int ans = r+c-2;
    for(int R=1;R<=r;R++) {
        for(int C=1;C<=c;C++) {
            if(check(R,C)) {
                ans=min(ans,R+C-2);
            }
        }
    }
    cout << ans << '\n';
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20
• Subtask 6: 0 / 20